Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a07e2419175276d…

MALICIOUS

PDF

75.4 KB Created: 2021-07-02 05:34:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: cebc25f7ac081f7644314a7dd0c8d662 SHA-1: 393b8626d1fba1416ba77ab8b883c0f54007434a SHA-256: 8a07e2419175276d7f38f5e729f7b9f5c25ef36c8b1f96ef3ede9aa097fedc8f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous external URIs and links pointing to compromised WordPress upload directories and other domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery. The document body is heavily obfuscated and unreadable, providing no direct clues to its specific purpose beyond the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://garglob.ru/uplcv?utm_term=anonymous+crime+report PDF link annotation
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2e9e0acdcd---67834966743.pdfIn PDF document text
    • http://vankouwenenmastop.nl/UserFiles/file/13245105108.pdfIn PDF document text
    • http://adria-ex.com/images/blog//file/wuzegazarifu.pdfIn PDF document text
    • http://irina-beha.com/ckfinder/userfiles/files/56677433271.pdfIn PDF document text
    • https://tigercabinetry.com/wp-content/plugins/super-forms/uploads/php/files/6f3a272deaf4ab168566e07bd94373d7/64392021027.pdfIn PDF document text
    • https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/f007b4574d07fdca85ec2f3c2c53a419/65682021385.pdfIn PDF document text
    • https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abaf3446721---30764043702.pdfIn PDF document text
    • http://lev-steklo.ru/userfiles/file/bivetorades.pdfIn PDF document text
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160958250b0993---83144722765.pdfIn PDF document text
    • https://alice-immo.com/userfiles/file/wiwevijelusenapemufozifos.pdfIn PDF document text
    • https://mimpishio1.com/contents//files/tavebaloj.pdfIn PDF document text
    • https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/84dertvdntcq2vtas9cbif6i05/nutidabalewi.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a2031c04417---82492140977.pdfIn PDF document text
    • http://lahma.pl/_u/userfiles/file/48031298931.pdfIn PDF document text
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/d188cc5acf9f30fbbaee72c62eecef9f/51891808812.pdfIn PDF document text
    • https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/8a56327187f00e7882a06546473a11c0/buweb.pdfIn PDF document text
    • https://hamasataccessories.com/userfiles/files/84753178497.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/ffe211fc9c57db2916a372ddb13c57ff/6213989509.pdfIn PDF document text
    • https://bem-sa.com/img/file/26133891286.pdfIn PDF document text
    • http://charivne.info/images/file/76584081295.pdfIn PDF document text
    • http://omak1968.com/clients/71178/File/fowekunilapew.pdfIn PDF document text
    • https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/91dbc87b310d303bec3f1e5aef077aeb/fukune.pdfIn PDF document text
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a9dacd50077---telelofa.pdfIn PDF document text
    • https://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac3a59589ad---verotefosenew.pdfIn PDF document text
    • https://angkorphotographyguide.com/userfiles/file/79926283621.pdfIn PDF document text
    • https://catbasailing.com/upload/fck/file/3003098780.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c5bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5BF 16388 bytes
SHA-256: 64be3c5f84b1b4705a95c8d839c9172cd99dafb0ace3522250fbcb0b1f4e1f28
font_01_sfnt_off0000f03a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF03A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010851.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10851 10520 bytes
SHA-256: 34c2c9accc9c4ad04a7ce74d060504aa6532a4043037a89429c94dde3a6fd24a

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